A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.

Why are some filings missing?

New filings appear as the SEC updates EDGAR, and older records can vary by availability.

How often is this page updated?

Updates follow new EDGAR submissions and periodic data refreshes.

Filer Snapshot

Mr. Herbert Chang

CIK 0001192171. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

247

Latest Filing

05 Feb 2026

Industry

n/a

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Open 13F if you want portfolio holdings.
Open 13D/G or insider pages only when this CIK has those rows.

Open reporting owner context

Source: SEC Forms 3/4/5

4 filed on 05 Feb 2026 for CIK 0001192171.

View Source Filing

Business address: C/O Monolithic Power Systems Inc., 79 Great Oaks Blvd, San Jose, CA, 95119
Top holdings (ownership): MPWR

Filer intelligence

What SEC filings say about Mr. Herbert Chang

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

Forms 3/4/5 show insider context for MPWR worth $557.4K.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed

13F portfolio No rows yet

Quarterly institutional portfolio holdings.

Open

13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

Open

Forms 3/4/5 1 rows

Officer, director, and 10% owner holdings or transactions.

Open

Forms 3/4/5 insider context

MPWR

03 Feb 2026

$557.4K

Issuer page Owner page

Latest update

What changed recently for Mr. Herbert Chang

Ownership report updated

Latest ownership report period: 03 Feb 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

05 Feb 2026

Page type

Ownership filings

Latest period

03 Feb 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 05 Feb 2026.

Open ownership filings Browse recent public updates

Filer Overview

Mr. Herbert Chang has filed 247 SEC EDGAR filings since 09 Dec 2002. Common forms include 4, 144, 4/A, SC 13G and more.

Mr. Herbert Chang SEC filings Mr. Herbert Chang owner filings

Latest Filings

Recent SEC filings for Mr. Herbert Chang with direct links to document and filing folders.

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 05 Feb 2026
Reporting date: 03 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 25 Nov 2025
Reporting date: 25 Nov 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 24 Nov 2025
Reporting date: 21 Nov 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 21 Nov 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 May 2025
Reporting date: 13 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 12 May 2025
Reporting date: 12 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 09 May 2025
Reporting date: 08 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 08 May 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 06 Feb 2025
Reporting date: 04 Feb 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 15 Aug 2024
Reporting date: 15 Aug 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 15 Aug 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 22 May 2024
Reporting date: 20 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 15 May 2024
Reporting date: 15 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 15 May 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Feb 2024
Reporting date: 29 Feb 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 23 Feb 2024
Reporting date: 22 Feb 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 22 Feb 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 08 Feb 2024
Reporting date: 06 Feb 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 15 Nov 2023
Reporting date: 14 Nov 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 Nov 2023
Reporting date: 13 Nov 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 13 Nov 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Aug 2023
Reporting date: 29 Aug 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 29 Aug 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 08 Feb 2023
Reporting date: 07 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 09 Feb 2022
Reporting date: 08 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 26 Feb 2021
Reporting date: 26 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 04 Feb 2021
Reporting date: 02 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

FORM 4

Filing date: 05 Nov 2020
Reporting date: 04 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 01 Sep 2020
Reporting date: 28 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 14 Aug 2020
Reporting date: 12 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 10 Aug 2020
Reporting date: 06 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 05 Aug 2020
Reporting date: 03 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 12 May 2020
Reporting date: 08 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 07 May 2020
Reporting date: 05 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 14 Feb 2020
Reporting date: 12 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 12 Feb 2020
Reporting date: 11 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 12 Feb 2019
Reporting date: 11 Feb 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 09 Feb 2018
Reporting date: 07 Feb 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 08 Feb 2017
Reporting date: 07 Feb 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Apr 2016
Reporting date: 28 Apr 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 10 Feb 2015
Reporting date: 09 Feb 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-51026

PRIMARY DOCUMENT

Filing date: 25 Apr 2014
Reporting date: 11 Feb 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 27 Feb 2014
Reporting date: 26 Feb 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 25 Feb 2014
Reporting date: 24 Feb 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 Feb 2014
Reporting date: 11 Feb 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Nov 2013
Reporting date: 27 Nov 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 Nov 2013
Reporting date: 11 Nov 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 08 Nov 2013
Reporting date: 06 Nov 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 28 Aug 2013
Reporting date: 28 Aug 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 26 Aug 2013
Reporting date: 26 Aug 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 19 Aug 2013
Reporting date: 15 Aug 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 14 Aug 2013
Reporting date: 12 Aug 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 31 May 2013
Reporting date: 28 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 01 Mar 2013
Reporting date: 27 Feb 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 Feb 2013
Reporting date: 11 Feb 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-51026

PRIMARY DOCUMENT

Filing date: 13 Feb 2013
Reporting date: 07 Feb 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 11 Feb 2013
Reporting date: 07 Feb 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 30 Aug 2012
Reporting date: 29 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Aug 2012
Reporting date: 27 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 24 Aug 2012
Reporting date: 23 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 23 Aug 2012
Reporting date: 21 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 17 Aug 2012
Reporting date: 16 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 15 Aug 2012
Reporting date: 14 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 10 Aug 2012
Reporting date: 09 Aug 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Feb 2012
Reporting date: 29 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 27 Feb 2012
Reporting date: 24 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 24 Feb 2012
Reporting date: 22 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 17 Feb 2012
Reporting date: 17 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 16 Feb 2012
Reporting date: 14 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 30 Aug 2011
Reporting date: 30 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 29 Aug 2011
Reporting date: 29 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 24 Aug 2011
Reporting date: 23 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 17 Aug 2011
Reporting date: 17 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-51026

PRIMARY DOCUMENT

Filing date: 15 Aug 2011
Reporting date: 11 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 11 Aug 2011
Reporting date: 11 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 31 May 2011
Reporting date: 31 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 31 May 2011
Reporting date: 27 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 20 May 2011
Reporting date: 06 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 19 May 2011
Reporting date: 19 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 18 May 2011
Reporting date: 18 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 May 2011
Reporting date: 13 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 13 May 2011
Reporting date: 12 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 04 May 2011
Reporting date: 03 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30877

FORM 4

Filing date: 30 Mar 2011
Reporting date: 28 Mar 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 10 Feb 2011
Reporting date: 08 Feb 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 01 Dec 2010
Reporting date: 30 Nov 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 30 Nov 2010
Reporting date: 29 Nov 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 22 Nov 2010
Reporting date: 19 Nov 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30877

FORM 4

Filing date: 09 Jul 2010
Reporting date: 08 Jul 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30877

FORM 4

Filing date: 14 Jun 2010
Reporting date: 10 Jun 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30877

FORM 4

Filing date: 09 Jun 2010
Reporting date: 07 Jun 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 02 Mar 2010
Reporting date: 02 Mar 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51026

PRIMARY DOCUMENT

Filing date: 09 Feb 2010
Reporting date: 09 Feb 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Mr. Herbert Chang files with the SEC under CIK 0001192171. This page aggregates EDGAR filings and related ownership activity.

FAQ

What is a CIK?: A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?: New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?: Updates follow new EDGAR submissions and periodic data refreshes.